I've a hard time debugging some cache issue and need some pointers on where to start looking. My application is concurrently running:
- A webserver which performs flash access to answer some HTTP requests (NVS/SPIFFS) and
- low level signal generation using the RMT, GPTimer and UART peripherals
The problem is that the log files don't seem to tell me much. They rather contain the result of my bugs, but not the cause. See for example the last log I've captured:
Code: Select all
Guru Meditation Error: Core 0 panic'ed (Cache disabled but cached memory region accessed).
Core 0 register dump:
PC : 0x4037abc8 PS : 0x00060034 A0 : 0x4037c094 A1 : 0x3fca50e0
0x4037abc8: shared_intr_isr at /home/vinci/esp/esp-idf/components/esp_hw_support/intr_alloc.c:446
0x4037c094: _xt_lowint1 at /home/vinci/esp/esp-idf/components/xtensa/xtensa_vectors.S:1236
A2 : 0x3c1b2cfc A3 : 0x00000002 A4 : 0x8038bf0c A5 : 0x40389bae
0x40389bae: _frxt_int_enter at /home/vinci/esp/esp-idf/components/freertos/FreeRTOS-Kernel/portable/xtensa/portasm.S:139
A6 : 0x3fce6854 A7 : 0x60002058 A8 : 0x00000bad A9 : 0x3fca50b0
A10 : 0x00000001 A11 : 0x00060021 A12 : 0x00000000 A13 : 0x00060023
A14 : 0xb33fffff A15 : 0xb33fffff SAR : 0x0000001c EXCCAUSE: 0x00000007
EXCVADDR: 0x00000000 LBEG : 0x400570e8 LEND : 0x400570f3 LCOUNT : 0x00000000
0x400570e8: memset in ROM
0x400570f3: memset in ROM
Backtrace: 0x4037abc5:0x3fca50e0 0x4037c091:0x3fca5100 0x400011f1:0x3fce6800 0x4038c2ad:0x3fce6830 0x40391449:0x3fce6850 0x4037f1e7:0x3fce68d0 0x420403c2:0x3fce6910 0x42020fab:0x3fce6940 0x42024ae3:0x3fce6970 0x4202274f:0x3fce69a0 0x42023f2a:0x3fce69f0 0x42021ca9:0x3fce6a30 0x42020c2d:0x3fce6a60 0x42008fe6:0x3fce6b10 0x420d2a09:0x3fce6b30 0x4201b6b6:0x3fce6b50 0x420e5185:0x3fce6c00 0x4201b1c6:0x3fce6c20 0x42062b0b:0x3fce6c50 0x42063c89:0x3fce6c90 0x42063d88:0x3fce6d20 0x42061ec4:0x3fce6d40 0x420610c0:0x3fce6d60 0x420e7073:0x3fce6d80 0x42061886:0x3fce6da0 0x420618f2:0x3fce6df0 0x40389839:0x3fce6e10
0x4037abc5: shared_intr_isr at /home/vinci/esp/esp-idf/components/esp_hw_support/intr_alloc.c:439
0x4037c091: _xt_lowint1 at /home/vinci/esp/esp-idf/components/xtensa/xtensa_vectors.S:1236
0x400011f1: __call_memset in ROM
0x4038c2ad: spi_flash_hal_read at /home/vinci/esp/esp-idf/components/hal/spi_flash_hal_common.inc:195
0x40391449: spi_flash_chip_generic_read at /home/vinci/esp/esp-idf/components/spi_flash/spi_flash_chip_generic.c:246
0x4037f1e7: esp_flash_read at /home/vinci/esp/esp-idf/components/spi_flash/esp_flash_api.c:898 (discriminator 4)
0x420403c2: esp_partition_read at /home/vinci/esp/esp-idf/components/esp_partition/partition_target.c:38
0x42020fab: spiffs_api_read at /home/vinci/esp/esp-idf/components/spiffs/spiffs_api.c:27
0x42024ae3: spiffs_phys_rd at /home/vinci/esp/esp-idf/components/spiffs/spiffs/src/spiffs_cache.c:161
0x4202274f: spiffs_obj_lu_find_entry_visitor at /home/vinci/esp/esp-idf/components/spiffs/spiffs/src/spiffs_nucleus.c:166
0x42023f2a: spiffs_object_find_object_index_header_by_name at /home/vinci/esp/esp-idf/components/spiffs/spiffs/src/spiffs_nucleus.c:1711
0x42021ca9: SPIFFS_stat at /home/vinci/esp/esp-idf/components/spiffs/spiffs/src/spiffs_hydrogen.c:804 (discriminator 2)
0x42020c2d: vfs_spiffs_stat at /home/vinci/esp/esp-idf/components/spiffs/esp_spiffs.c:622
0x42008fe6: esp_vfs_stat at /home/vinci/esp/esp-idf/components/vfs/vfs.c:594 (discriminator 3)
0x420d2a09: stat at /builds/idf/crosstool-NG/.build/xtensa-esp32s3-elf/src/newlib/newlib/libc/syscalls/sysstat.c:11
0x4201b6b6: http::sta::Server::wildcardGetHandler(httpd_req*) at /home/vinci/Develop/VSCode/WULF/src/http/sta/server.cpp:230
0x420e5185: int std::__invoke_impl<int, int (http::sta::Server::*&)(httpd_req*), http::sta::Server*&, httpd_req*>(std::__invoke_memfun_deref, int (http::sta::Server::*&)(httpd_req*), http::sta::Server*&, httpd_req*&&) at /home/vinci/.espressif/tools/xtensa-esp32s3-elf/esp-12.2.0_20230208/xtensa-esp32s3-elf/xtensa-esp32s3-elf/include/c++/12.2.0/bits/invoke.h:74 (discriminator 4)
0x4201b1c6: std::__invoke_result<int (http::sta::Server::*&)(httpd_req*), http::sta::Server*&, httpd_req*>::type std::__invoke<int (http::sta::Server::*&)(httpd_req*), http::sta::Server*&, httpd_req*>(int (http::sta::Server::*&)(httpd_req*), http::sta::Server*&, httpd_req*&&) at /home/vinci/.espressif/tools/xtensa-esp32s3-elf/esp-12.2.0_20230208/xtensa-esp32s3-elf/xtensa-esp32s3-elf/include/c++/12.2.0/bits/invoke.h:96
(inlined by) std::invoke_result<int (http::sta::Server::*&)(httpd_req*), http::sta::Server*&, httpd_req*>::type std::invoke<int (http::sta::Server::*&)(httpd_req*), http::sta::Server*&, httpd_req*>(int (http::sta::Server::*&)(httpd_req*), http::sta::Server*&, httpd_req*&&) at /home/vinci/.espressif/tools/xtensa-esp32s3-elf/esp-12.2.0_20230208/xtensa-esp32s3-elf/xtensa-esp32s3-elf/include/c++/12.2.0/functional:110
(inlined by) operator() at /home/vinci/Develop/VSCode/WULF/src/utility.hpp:57
(inlined by) _FUN at /home/vinci/Develop/VSCode/WULF/src/utility.hpp:56
0x42062b0b: httpd_uri at /home/vinci/esp/esp-idf/components/esp_http_server/src/httpd_uri.c:329
0x42063c89: httpd_parse_req at /home/vinci/esp/esp-idf/components/esp_http_server/src/httpd_parse.c:667 (discriminator 15)
0x42063d88: httpd_req_new at /home/vinci/esp/esp-idf/components/esp_http_server/src/httpd_parse.c:795
0x42061ec4: httpd_sess_process at /home/vinci/esp/esp-idf/components/esp_http_server/src/httpd_sess.c:426 (discriminator 15)
0x420610c0: httpd_process_session at /home/vinci/esp/esp-idf/components/esp_http_server/src/httpd_main.c:255 (discriminator 15)
0x420e7073: httpd_sess_enum at /home/vinci/esp/esp-idf/components/esp_http_server/src/httpd_sess.c:50 (discriminator 1)
0x42061886: httpd_server at /home/vinci/esp/esp-idf/components/esp_http_server/src/httpd_main.c:305
0x420618f2: httpd_thread at /home/vinci/esp/esp-idf/components/esp_http_server/src/httpd_main.c:327 (discriminator 15)
0x40389839: vPortTaskWrapper at /home/vinci/esp/esp-idf/components/freertos/FreeRTOS-Kernel/portable/xtensa/port.c:162